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Literature will give full information about it all.
If something unsuitable or harmful, to the system, is absorbed it creates certain changes in such a way that the effects are felt atonce. Take for example--any medicine, alcohol or chloroform or any poison etc. If sulphuric acid or nitric acid is applied to any metal the metal is consumed. This consumption of the metal does not mean that it has vanished, but, speaking scientifically, some third substauce is produced or generated due to the active reaction of the acid on the metal. Yet in still stricter scientific terms, it is said that the internal structure of the molecules of the two reacting substances have changed, which only means a reorientation of "ions” inside the molecules-which finally change the whole nature, characteristic, properties, consititution and effects etc. in such a way that the resulting substance. or substances take the name, form and designation of a totally different substance having no similarity with the original acid or the metal-which combined or took part in the reaction.
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